Elephants can communicate using sounds below the range of human hearing ("infrasounds'' below 20 hertz). It is commonly speculated that these vocalizations are produced in the larynx, either by neurally controlled muscle twitching (as in cat purring) or by flow-induced self-sustained vibrations of the vocal folds (as in human speech and song). We used direct high-speed video observations of an excised elephant larynx to demonstrate flow-induced self-sustained vocal fold vibration in the absence of any neural signals, thus excluding the need for any "purring'' mechanism. The observed physical principles of voice production apply to a wide variety of mammals, extending across a remarkably large range of fundamental frequencies and body sizes, spanning more than five orders of magnitude.

I think acoustics are used to support a rotating molten facsimile of the earth for study.

We haven't begun to understand elephants yet, or how intelligent they are.Elephants and blue whales could easily have more sophisticated brains than ours.They are known to pass on large amounts of learned knowledge to their young.Researchers have started recording their low frequency communication, and trying to understand them.They can communicate over long distances because the lower frequencies travel so well.

They seem to mourn their own dead, and some humans too.Fascinating animals.

there are certain minds that do not hum and do not belong on this thread...

no names though, because lord knows that person would whine complain cry and bitch until i got punted from the boards because that person is a lying piece of shit and a pathological forum board fibber...

Male bed bugs sometimes attempt to mate with other males and pierce the latter in the abdomen. This behaviour occurs because sexual attraction in bed bugs is based primarily on size, and males will mount any freshly fed partner regardless of sex. The "bed bug alarm pheromone" consists of (E)-2-octenal and (E)-2-hexenal. It is released when a bed bug is disturbed, as during an attack by a predator. A 2009 study demonstrated the alarm pheromone is also released by male bed bugs to repel other males who attempt to mate with them.